Symfony

Symfony is a high-performance PHP framework for building web applications, known for its flexibility, reusability, and large community support.

Sympa

Sympa is Open Source mailing list management software that simplifies communication and collaboration.

Synapse Admin is a maintained fork of the admin console for Matrix Synapse homeservers, offering enhanced features and usability.

Sync-in is an open-source file storage, sharing, and collaboration platform that prioritizes data sovereignty, security, and user control.

Syncthing

Syncthing is an open-source, decentralized file synchronization program that securely syncs files between multiple devices in real time without a central server.

SysEleven MetaKube

SysEleven MetaKube provides flexible and scalable managed Kubernetes solutions to optimize business agility and efficiency.

Syslog-ng

syslog-ng Open Source Edition is a highly flexible and extensible log management system for collecting, processing, and routing logs from diverse sources.

SYSUN TECHNOLOGIES is a cybersecurity web application offering threat detection, managed defense, incident response, audits, and system protection services.

Tableaunoir is an online collaborative blackboard with interactive fridge magnets for teaching, presentations, and animation creation.

Taiga

Taiga is a free and Open Source project management tool for agile teams offering Kanban and Scrum support, intuitive interface, and robust customization options.

Tailscale

Tailscale provides a simple, secure, and scalable networking solution for connecting users, devices, and services.

Talentia is an AI-powered web application platform that simplifies and optimizes HR and Finance management for businesses.

Tanaguru

Tanaguru provides comprehensive web accessibility solutions, from training and consulting to Open Source tools and website development.

Tantivy is a full-text search engine library inspired by Apache Lucene and written in Rust

Tarantool

Tarantool is a high-performance, in-memory database that combines the speed of an application server with the reliability of a persistent database.

TDP is a free, Open Source, and community-driven big data platform offering robust performance, flexible deployment, and strong security.

Teable

Teable is a super-fast, real-time, no-code database built on PostgreSQL, offering a spreadsheet-like interface for collaborative data management.

Teampass is a secure, self-hosted, and collaborative password manager for teams and organizations.

Teamwire is a secure, GDPR-compliant business messenger for critical communication in sectors like public safety, healthcare, and government, offering fail-safe messaging, video calls, and emergency features.

Tebi is a high-speed, highly reliable, geo-distributed object storage solution with S3 compatibility and a free tier.

Techcelerator is a startup accelerator and investor connector that provides expert guidance, resources, and funding opportunities to help technology startups grow from early stages to investment readiness.

Tecnalia is a research and innovation center that develops technological solutions to create business benefits and societal value across various industries.

Telamon offers two complementary business software solutions—BART for product information management and IAXX for purchase and inventory optimization—tailored for the specialized distribution sector.